概念:
解决方案:
示例介绍:
现在我们看一下装饰者接口的定义:
/// <summary>
/// 装饰者模式模型,接口
/// </summary>
public interface IDecorator
{
string Name { get; }
int Sum { get; }
void Add(IDecorator decorator);
}
接下来是装饰者类CDecorator类的定义:
/// <summary>
/// 装饰者类
/// </summary>
public class CDecorator:IDecorator
{
private string myName; private int mySum; private ArrayList myDecorator; public CDecorator()
{
myName = "";
mySum = 0;
myDecorator = new ArrayList();
} //只读属性,名称
public string Name
{
get
{
string result = myName;
foreach (IDecorator d in myDecorator)
{
result += ", " + d.Name;
}
return myName;
}
} //只读属性,合计值
public int Sum
{
get
{
int result = mySum;
foreach (IDecorator d in myDecorator)
{
result += d.Sum;
}
return mySum;
}
} //添加装饰者对象
public void Add(IDecorator decorator)
{
myDecorator.Add(decorator);
}
}
下面我们通过代码测试下这个模型:
//应用测试
class Program
{
static void Main(string[] args)
{
CDecorator decoratorA = new CDecorator("decoratorA", 1);
CDecorator decoratorB = new CDecorator("decoratorB", 2);
CDecorator decoratorC = new CDecorator("decoratorC", 3); decoratorA.Add(decoratorB);
decoratorA.Add(decoratorC); Console.WriteLine(decoratorA.Name);
Console.WriteLine(decoratorA.Sum); Console.Read();
}
}
运行结果如下:
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }